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Diffstat (limited to 'build/autoconf/arch.m4')
| -rw-r--r-- | build/autoconf/arch.m4 | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/build/autoconf/arch.m4 b/build/autoconf/arch.m4 new file mode 100644 index 000000000..20af6ad7d --- /dev/null +++ b/build/autoconf/arch.m4 @@ -0,0 +1,254 @@ +dnl This Source Code Form is subject to the terms of the Mozilla Public +dnl License, v. 2.0. If a copy of the MPL was not distributed with this +dnl file, You can obtain one at http://mozilla.org/MPL/2.0/. + +AC_DEFUN([MOZ_ARCH_OPTS], +[ + +dnl ======================================================== +dnl = ARM toolchain tweaks +dnl ======================================================== + +MOZ_THUMB=toolchain-default +MOZ_THUMB_INTERWORK=toolchain-default +MOZ_FPU=toolchain-default +MOZ_FLOAT_ABI=toolchain-default +MOZ_SOFT_FLOAT=toolchain-default +MOZ_ALIGN=toolchain-default + +MOZ_ARG_WITH_STRING(arch, +[ --with-arch=[[type|toolchain-default]] + Use specific CPU features (-march=type). Resets + thumb, fpu, float-abi, etc. defaults when set], + if test -z "$GNU_CC"; then + AC_MSG_ERROR([--with-arch is not supported on non-GNU toolchains]) + fi + MOZ_ARCH=$withval) + +if test -z "$MOZ_ARCH"; then + dnl Defaults + case "${CPU_ARCH}-${OS_TARGET}" in + arm-Android) + MOZ_THUMB=yes + MOZ_ARCH=armv7-a + MOZ_FPU=vfp + MOZ_FLOAT_ABI=softfp + MOZ_ALIGN=no + ;; + arm-Darwin) + MOZ_ARCH=toolchain-default + ;; + esac +fi + +if test "$MOZ_ARCH" = "armv6" -a "$OS_TARGET" = "Android"; then + MOZ_FPU=vfp + MOZ_FLOAT_ABI=softfp +fi + +MOZ_ARG_WITH_STRING(thumb, +[ --with-thumb[[=yes|no|toolchain-default]]] +[ Use Thumb instruction set (-mthumb)], + if test -z "$GNU_CC"; then + AC_MSG_ERROR([--with-thumb is not supported on non-GNU toolchains]) + fi + MOZ_THUMB=$withval) + +MOZ_ARG_WITH_STRING(thumb-interwork, +[ --with-thumb-interwork[[=yes|no|toolchain-default]] + Use Thumb/ARM instuctions interwork (-mthumb-interwork)], + if test -z "$GNU_CC"; then + AC_MSG_ERROR([--with-thumb-interwork is not supported on non-GNU toolchains]) + fi + MOZ_THUMB_INTERWORK=$withval) + +MOZ_ARG_WITH_STRING(fpu, +[ --with-fpu=[[type|toolchain-default]] + Use specific FPU type (-mfpu=type)], + if test -z "$GNU_CC"; then + AC_MSG_ERROR([--with-fpu is not supported on non-GNU toolchains]) + fi + MOZ_FPU=$withval) + +MOZ_ARG_WITH_STRING(float-abi, +[ --with-float-abi=[[type|toolchain-default]] + Use specific arm float ABI (-mfloat-abi=type)], + if test -z "$GNU_CC"; then + AC_MSG_ERROR([--with-float-abi is not supported on non-GNU toolchains]) + fi + MOZ_FLOAT_ABI=$withval) + +MOZ_ARG_WITH_STRING(soft-float, +[ --with-soft-float[[=yes|no|toolchain-default]] + Use soft float library (-msoft-float)], + if test -z "$GNU_CC"; then + AC_MSG_ERROR([--with-soft-float is not supported on non-GNU toolchains]) + fi + MOZ_SOFT_FLOAT=$withval) + +case "$MOZ_ARCH" in +toolchain-default|"") + arch_flag="" + ;; +*) + arch_flag="-march=$MOZ_ARCH" + ;; +esac + +case "$MOZ_THUMB" in +yes) + MOZ_THUMB2=1 + thumb_flag="-mthumb" + ;; +no) + MOZ_THUMB2= + thumb_flag="-marm" + ;; +*) + _SAVE_CFLAGS="$CFLAGS" + CFLAGS="$arch_flag" + AC_TRY_COMPILE([],[return sizeof(__thumb2__);], + MOZ_THUMB2=1, + MOZ_THUMB2=) + CFLAGS="$_SAVE_CFLAGS" + thumb_flag="" + ;; +esac + +if test "$MOZ_THUMB2" = 1; then + AC_DEFINE(MOZ_THUMB2) +fi + +case "$MOZ_THUMB_INTERWORK" in +yes) + thumb_interwork_flag="-mthumb-interwork" + ;; +no) + thumb_interwork_flag="-mno-thumb-interwork" + ;; +*) # toolchain-default + thumb_interwork_flag="" + ;; +esac + +case "$MOZ_FPU" in +toolchain-default|"") + fpu_flag="" + ;; +*) + fpu_flag="-mfpu=$MOZ_FPU" + ;; +esac + +case "$MOZ_FLOAT_ABI" in +toolchain-default|"") + float_abi_flag="" + ;; +*) + float_abi_flag="-mfloat-abi=$MOZ_FLOAT_ABI" + ;; +esac + +case "$MOZ_SOFT_FLOAT" in +yes) + soft_float_flag="-msoft-float" + ;; +no) + soft_float_flag="-mno-soft-float" + ;; +*) # toolchain-default + soft_float_flag="" + ;; +esac + +case "$MOZ_ALIGN" in +no) + align_flag="-mno-unaligned-access" + ;; +yes) + align_flag="-munaligned-access" + ;; +*) + align_flag="" + ;; +esac + +if test -n "$align_flag"; then + _SAVE_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $align_flag" + AC_MSG_CHECKING(whether alignment flag ($align_flag) is supported) + AC_TRY_COMPILE([],[],,align_flag="") + CFLAGS="$_SAVE_CFLAGS" +fi + +dnl Use echo to avoid accumulating space characters +all_flags=`echo $arch_flag $thumb_flag $thumb_interwork_flag $fpu_flag $float_abi_flag $soft_float_flag $align_flag` +if test -n "$all_flags"; then + _SAVE_CFLAGS="$CFLAGS" + CFLAGS="$all_flags" + AC_MSG_CHECKING(whether the chosen combination of compiler flags ($all_flags) works) + AC_TRY_COMPILE([],[return 0;], + AC_MSG_RESULT([yes]), + AC_MSG_ERROR([no])) + + CFLAGS="$_SAVE_CFLAGS $all_flags" + CXXFLAGS="$CXXFLAGS $all_flags" + ASFLAGS="$ASFLAGS $all_flags" + if test -n "$thumb_flag"; then + LDFLAGS="$LDFLAGS $thumb_flag" + fi +fi + +AC_SUBST(MOZ_THUMB2) + +if test "$CPU_ARCH" = "arm"; then + NEON_FLAGS="-mfpu=neon" + AC_MSG_CHECKING(for ARM SIMD support in compiler) + # We try to link so that this also fails when + # building with LTO. + AC_TRY_LINK([], + [asm("uqadd8 r1, r1, r2");], + result="yes", result="no") + AC_MSG_RESULT("$result") + if test "$result" = "yes"; then + AC_DEFINE(HAVE_ARM_SIMD) + HAVE_ARM_SIMD=1 + fi + + AC_MSG_CHECKING(ARM version support in compiler) + dnl Determine the target ARM architecture (5 for ARMv5, v5T, v5E, etc.; 6 for ARMv6, v6K, etc.) + ARM_ARCH=`${CC-cc} ${CFLAGS} -dM -E - < /dev/null | sed -n 's/.*__ARM_ARCH_\([[0-9]][[0-9]]*\).*/\1/p'` + AC_MSG_RESULT("$ARM_ARCH") + + AC_MSG_CHECKING(for ARM NEON support in compiler) + # We try to link so that this also fails when + # building with LTO. + AC_TRY_LINK([], + [asm(".fpu neon\n vadd.i8 d0, d0, d0");], + result="yes", result="no") + AC_MSG_RESULT("$result") + if test "$result" = "yes"; then + AC_DEFINE(HAVE_ARM_NEON) + HAVE_ARM_NEON=1 + + dnl We don't need to build NEON support if we're targetting a non-NEON device. + dnl This matches media/webrtc/trunk/webrtc/build/common.gypi. + if test -n "$ARM_ARCH"; then + if test "$ARM_ARCH" -lt 7; then + BUILD_ARM_NEON= + else + AC_DEFINE(BUILD_ARM_NEON) + BUILD_ARM_NEON=1 + fi + fi + fi + +fi # CPU_ARCH = arm + +AC_SUBST(HAVE_ARM_SIMD) +AC_SUBST(HAVE_ARM_NEON) +AC_SUBST(BUILD_ARM_NEON) +AC_SUBST(ARM_ARCH) +AC_SUBST_LIST(NEON_FLAGS) + +]) |